Grinding machine



April 14, 1925. 1,533,821

w. s. AMBERSON GRINDING MACHINE Filed Jan. 22,1924 3 Sheets-Shem 1' WITNESS: ATTORNEY April 14, 1925. 1,533, 21

W. S. AMBERSON GRINDING MACHINE Filed Jan. 22', 1924 3 Sheets-Sheet 5 WITNESS: ATTORNEY Patented Apr. 14, 1925.

WILLIAM S. AMBERSON, OF WAYNESEBORO, PENNSYLVANIA.

GRINDING JMACHINE.

Application filed January 22, 1924:. Serial :No. 687, 827.

To all whom'it may concern:

Be it known that I, "VTLLIAM S. Ammansolv, a citizen of the United States, residing at Vaynesboro, in the county of Frank ""l'in Hand State of Pennsylvania have in- \jD'iTGCl new and useful Improvements in Utrmding Machines, of which the following is :a specification. I V

This invention relates to an apparatus for grinding cylinders and the like, the general object of the invention being to provide means for revolving the :grinding .tool and feeding it longitudinally simultaneously and forrotatiing the cylinder 'to be ground so that the grinding tool will come in contact with all parts ofthe cylinder surface to be ground.

Another object of the invention is vto pro vide means for moving the stool carrying part horizontally at the end of each ver ticalstroke of the tool so that the tool will grind'deeper into the wall of the cylinder in its new vertical movement.

A further object of the invention is to .provide means for automa-t-ically-causing the longitudinal movement of the grinding tool to be reversed at certain points in its downward and upward movement.

This invention also consists in certain other features ofconstruction and in the combination and arra-ngen'ient of thesevural parts, to be hereinafter fully described, illustrated in the accompanying drawings and specifically "pointed out in the appended (,TilZLlII-"IS. I

In describing my invention in detail, 'ref- (-refi'ice will behad to the accompanying v wings wherein ilihecharacters denote like :or corresponding partsthroughout the sev; cral views, and in which:

Figure 1 is :a side view ofthe apparatus. Figure 2 is a plan view,

Figure 3 is a longitudinal sectional view;

Figure .4 is a section on line 1l of Fig- .urel.

Figure hand lever. and the parts associated there with for operating theclutch of the worm shaft. v. 5

Figure 6 is asection on line 6- 6 of Figure 3 with parts removed.

"Figure 7 are 5 is an enlarged eleant-ion. of the 18.21 section on 1li'ne" 77 of Fig-;

Figure 8 is section on lineS-S of Figure 4. g

Figure :9 is a side view with parts in section of the parts shown in Figure 8.

Figure 10-is a sectional detail view of the spring means for moving the worm shaft clutch. f

In these views, 1 indicates abase upon which is =inounted the cylindrical supportfi for the turn-table 3 and the housing at upon which issupported the upright and which carrying a nut 10 which engages the screw shaft 6 so that when the shaft is rotated the arm will be raised and lowered on the support. The tool carrylng shaft 11 1s formed of two portions which are connected A frame 8 is together in the head 12 which is slidably mounted; on the enlarged outer end 13 of the arm which is of arc shape so that the head will travel in an arc of a circle. The

upper end of this shaft passes through the outer end :of the frame 8 and has a gear 14 slidably but non-rotatably mounted thereon, the gear being held against' sliding move ment by a weight 15 on the upper end of the shaft. 'lhe tool is shown at 16 on the lower end of the shaft. These parts will permit the shaft 11 and the tool to be moved vertically when the arm 9 moved on the upright by the shaft 6; The tool shaft can alsojbe moved in an arc of a circle by moving the head 12 on the enlargement- 13 by means of the hand wheel 17 which has a threaded part for engaging a screw shaft 18 which has its bearing 19 swiv-eled to a bracket .20, secured to one end of the en largement 1 3 and the inner end of the screu shaft'is pivoted to the head, as shown at 21.

KVhen the head; is given this horizontalmovement the "frame 8 will also be given a horizo-ntal movement by the shaft 11. Thls will permit the tool to be brought against the, wall of a cylinder being ground. The gear 1 1 is in mesh with agear 22 fastened to the stub shaft 23 carried by the frame 8 and,

which-is connected by the beveled gears 2-1- sleeve vertically.

with the shaft carried by the frame 8 and which is connected by the bevel gears 26 with the the shaft 27 Which is journaled in the upright This shaft 27 is geared to a shaft "28 by the gears 29, the shaft 28 being arranged in the housing 4 and being connected that the said screw shaft can be rotated in" one direction'or the'other from the shaft 28.

The clutch gears can be shifted by means of a hand lever 57 which is connected with the outer end of the shaft 38 journaled in thehousing and to which the'yoke part 39 of a bell crank 4 is connected, this yoke part engaglng a groove in the connecting part of the clutch gears. I also provide means for auton'iatically shifting the gears when the arn'i 9 reaches the upper and lower limits of its n'iovement, such means consisting of a rod 4-1 connected with the bell crank 40 and passing through The housing and through a sleeve %2 which is provided with the collars 4; This sleeve passes through a notched extension let on the arm 9 which is adapted to engage the collars 43 and thus move the Springs are placed on the rod 41, one above the sleeve and one below the same and the ends of these springs engage the collars 43 and the projections 46 on the rod so that the springs will be compressed by the movement of the sleeve and will thus tend to move the rod to shift the v clutch gears through means of the bell crank.

In order to store up energy in the springs to snap the gears into mesh with the gear 36 I provide a pair of sprmg plungers 4C7 wlnch operate in cylinders at? on an arc member 49 carried by the casing 4 and which engage the depressions 50 in the hand lever and tend to hold the hand lever'in its llmits'of moverment and thus preventmovement of the clutch parts by the springs 45. A cam 51,

lever and has a counter-balanced weight at one end thereof and its other end is connected with a rod 56 which has its upper end passing through holesformed in arms 51' on the collars L3 and connected to said iarms by set screws so that said rod will move the sleeve 4:2 and thus cause the lever 54. to swing the arm 62 in one direction or the other and cause the cam 51 to engage the roller on the plunger to release the plunger from the recess in the handle and thus permit the stored up energy in the spring 45 to act on theclutch parts through 'the rod 41.

-These-parts are so arranged that the sleeve 42 is moved to a considerable extent to store up energy in the spring 45 before the rod 56 is moved sufiiciently to cause the cam 51 to operate the plunger to retract the same. This action will cause the clutch gears to be snapped into mesh with the gear 56.

I also provide means for automatically moving the head 12 in an arc of a circle to adjust the tool against the Wall of a cylinder block. Such means consists of a ratchet Wl1eel 59 formed. on the hub of the wheel 17- 'and a pawl 60 carried by a levere6l pivoted to the shaft so that the pawl will engage the ratchet wheel. A link 62 connects the lever 61 with an arm 63 pivoted intermediate its ends and which is in turn connected by a ,hnk 64 with a similar arm 65 which is normally held in neutral position by the springs i This arm 65 is adapted to be rocked in '"one' direction or the other by the vertical "movement of the arm 9 by means of the rollers 67 on the brackets 68 carried by the rod 56 so that as the arm 9 nears the limit of municat-ed to the arm63 and through this arm to the ratchet mechanism so that the This turning n1ov ementof the Wheel will cause the threaded wheel 17 is turned.

shaft 18 to be moved longitudinally and thus the frameS and head 12 will be moved horizontally to cause the tool to be moved against the wall of the cylinder block.

From the foregoing it will be seen thatthe tool shaft is rotated from the shaft- 28 through the gears and shaftin'g mentionech the tool is given a re-ciprocatory motion by the worm shaft 6 and its associated parts so that it will engage the length of the cylinder ifvall while the cylinder is being rotated by 'the turntable and the tool at each "end of its vertical movement is moved slightly-1n a horizontal plane so that it will grind deeper into the wall in its new'vertical lDOYGl'l'lQ'lit.

The niovements are all automatic so that'the device needs but slight attention. r

I provide holding jaws'69 for holding th cylinder block, as shown at A in dotted lines inFigure 3, in the turn-table, these holding members operating in radial grooves in the turntable and being adjusted by'the screw shafts 70 carried by the turntable and having their outer ends formed to fit a suitable wrench, as shown at T1. a hose 72 for supplying water or the like to the surface being-ground. I i

I also wish it to be understood that my i1nproved grinding machine may be used for grinding one or more cylinders simulta- I may also provide neously and when a multiplicity cylinders are being groundll contemplate makingsuch changes inthe grindingmachine as to adapt the machine to the'immb'er -of cylinders tobe rodand a handle-t er for starting thec'h-ltch igea rs acted on. p

It is thoughtfromthe folegoing description that the advantages and novel features" of my invention will be readily apparent.

I desire it to be understood that I may mak changes in the construction and in the combination and arrangement of the several parts, provided that such changes fall within the scope of the appended claims.

hat I claim is 1. A device of the class described comprising a work holder, means for rotating the same, an upright, an arm slidably mounted thereon, a head movable on the outer end of the arm in an arc of a circle, a frame rotatably connected with the upright and arranged over the arm and head, a shaft carried by the head and'having its upper end slidably mounted in the outer end of the frame, gears and shafting carried by theframe for rotating the shaft, a tool carried by the shaft, a screw shaft, a nut on the arm engaging the same for moving the arm vertically, a drive shaft, means for transmitting the movement of the same to the driving means 011 the frame, gearing including clutch gears for connecting the drive shaft with the screw shaft. a rod connected with the clutch gears for shifting the same, springs on the rod, a member engaging the springs and actuated by the reciprocatory movement of the arm for tensibning the springs, means for preventing movement of the rod, means for releasing said means when the springs are under their greatest tension whereby the stored up energy in the springs through the medium of the rods will snap the clutch gears into mesh.

2. A device of the class described comprising a work holder, means for rotating the same, an upright, an arm slidably mounted thereon, a head movable on the outer end of the arm in an arc of a circle, a frame rotatably connected with the upright and arranged over the arm and head, a shaft carried by the head and having its upper end slidably mounted in the outer end of the frame, gears and shaftingcarried by the frame for rotating the shaft, a tool carried by the shaft, a screw shaft, a nut on the arm engaging the same for-moving the arm vertically, a drive shaft, means for transmitting the movement of the same to the driving means on the frame, gearing including clutch gears for connecting the drive shaft with the screw shaft, a rod connected with the clutch gears for shifting the same, springs on the rod, a member engaging the springs and actuated by the reciprocatory.

movement of the arm for tensioning the sprlngs, means for preventingmovement of ergy 'in the spri the rod until the parts of said means are in a certain positionso "that the storeel up enf "gs will snap *the clutch gears into mesh tlrroug h't he medium of t he -3. "device of the class described comprising a work holder, means for rotating the same, an upright, an arm slidably mounted thereon, ahead movable on th outer end of the arm in an arc of a circle, a frame rota-tably connected with the upright and arranged over the arm and head, a shaftcarried by the head and having its upper end slidably mounted in the outer endof the frame, gears and shafting carried by the frame for rotating. the shaft, a tool carried by the shaft, a screw shaft, a nut on the arm engaging the same for moving the arm vertically, a drive shaft, means for transmitting the movement of the same to the driving means on the frame, gearing including clutch gears for connecting the drive shaftwith the screw shaft, a rod connected with the clutch gears for shifting the same, springs on the rod, a member engaging the springs and actuated by the reciproeatory movement of the arm for tension ing the springs, means for preventing movement of the rod until the parts of said means are in a certain position so that the stored up energy in the springs will snap the clutch gears into mesh through the medium of the rod and means actuated by the reciprocatory movement of the arm for automatically moving the parts in anarc ofa circle to keep the tool against the surface being operated upon. i

4;. Anapparatus of the class described comprising a turn-table, jaws adjustably mounted thereon for gripping the workfpiece, an upright, an arm slidably mounted 'thereon a head ad ustabl Y mounted on the arm, a tool shaft passing through the head, a tool connected with the lower end of the shaft, a member rotatably connected with the upper end of the upright, a gear there on keyed to the tool shaft so that the shaft can slide through the same, a shaft passing through the upright, means for driving the gear from said shaft, such means being carried by the member, a screw shaft connected with the arm for moving the same upon the upright, and means for rotating the screw shaft, the shaft in the upright and the turntable.

5. An apparatus of the class described comprising a turn-table, jaws adjustably mounted thereon for gripping the Worl piece, an upright, an arm slidably mounted thereon, a head adjustably mounted on the arm, a tool shaft passing through the head, a tool connected with the lower end of the shaft, a member rotatably connected with the upper end of the upright, a gear thereon through the upright, means for driving the gear from said shaft, such means being eari ried by the member, a screw shaft connected with the arm for moving the same upon the u ri ht means for rota-tin the screw shaftb a a g a the shaft in the upright and the turn-table 'andhautomatic' means .for reversing the movement of the screw shaft when the arm reaches Certain positions on its upward and downward movements.

In testimon whereof I aflix my signature.- W ILLIAM S. AMBERSON. 

